I have the following query:

function useAllOrders(ownerId, storeId) {
  const { data, loading, error } = useQuery(
    gql`
      query getOrders($ownerId: String!) {
        orders(query: { owner_id: $ownerId }) {
          _id
          // ... field list              
        }
      }
    `,
    { variables: { ownerId: `owner_id=${ownerId}&store_id=${storeId}` } }
  );
  if (error) {
    throw new Error(`Failed to fetch tasks: ${error.message}`);
  }
  const orders = data?.orders ?? [];
  return { orders, loading };
}

What I need to do is being able to query the order just by owner if storeId is null|undefined. That means that I should be able to do a partial find with owner_id=${ownerId}%. How can I achieve this?